[REF] move app and compiler code around

src/compiler/index.ts

@@ -0,0 +1,26 @@
+import type { BDom } from "../blockdom";
+import { CodeGenerator, Config } from "./code_generator";
+import { parse } from "./parser";
+
+export type Template = (context: any, vnode: any, key?: string) => BDom;
+
+export type TemplateFunction = (blocks: any, utils: any) => Template;
+
+interface CompileOptions extends Config {
+  name?: string;
+}
+export function compile(template: string, options: CompileOptions = {}): TemplateFunction {
+  // parsing
+  const ast = parse(template);
+
+  // some work
+  const hasSafeContext = !template.includes("t-set") && !template.includes("t-call");
+  const name = options.name || (template.length > 250 ? template.slice(0, 250) + "..." : template);
+
+  // code generation
+  const codeGenerator = new CodeGenerator(name, ast, { ...options, hasSafeContext });
+  const code = codeGenerator.generateCode();
+
+  // template function
+  return new Function("bdom, helpers", code) as TemplateFunction;
+}